Should I enter vehicles or packs?

Use whichever population matches your claim cost basis. If one vehicle has one pack, either basis may match.

What should claim cost include?

Include parts, labor, diagnostics, freight, dealer handling, field support, and any expected goodwill cost.

How do I handle supplier recovery?

Estimate gross exposure here, then subtract expected supplier recovery in your reserve model if appropriate.

How can I use the result?

Use it to size reserves, prioritize containment, compare repair options, and support warranty risk discussions.

EV & Battery Manufacturing calculator

Battery Warranty Exposure Calculator

Battery warranty exposure can include pack replacement, module service, diagnostics, transport, loaner vehicles, and field engineering. This calculator helps warranty, quality, and finance teams size the potential cost of a known or suspected battery issue.

What this calculator does

Estimate battery warranty exposure from vehicles or packs in service, expected claim cost, claim rate, and fixed campaign cost.
an EV program team needs a quick warranty reserve or campaign exposure estimate for battery packs in the field
Returns estimated warranty dollars for an exposed EV battery population.

Formula used

Variable battery warranty cost = exposed population × claim cost × expected claim rate
Total warranty exposure = variable warranty cost + fixed campaign/support cost

Inputs explained

Exposed packs or vehicles: Use the population covered by the issue, campaign, or reserve estimate.
Average battery claim cost: Include diagnostics, parts, labor, logistics, and goodwill when applicable.
Expected warranty claim rate: Use field data, reliability models, or engineering judgment for the exposed population.
Fixed campaign/support cost: Add software release, field engineering, dealer tools, communication, or investigation cost.

How to use the result

Use it for warranty reserves, field issue triage, supplier recovery, and campaign sizing.
It is not a reliability model; claim timing, severity distribution, legal exposure, and safety recall rules are not modeled.

Common questions

Should I enter vehicles or packs? Use whichever population matches your claim cost basis. If one vehicle has one pack, either basis may match.
What should claim cost include? Include parts, labor, diagnostics, freight, dealer handling, field support, and any expected goodwill cost.
How do I handle supplier recovery? Estimate gross exposure here, then subtract expected supplier recovery in your reserve model if appropriate.
How can I use the result? Use it to size reserves, prioritize containment, compare repair options, and support warranty risk discussions.

Last reviewed 2026-05-12.